摘要： 以自制低黏度二聚酸改性环氧树脂(HEH)、双酚A环氧树脂和低黏度固化剂开发出VOC含量为79.2 g/L的高固体分环氧涂料。采用盐雾试验、3.5%Na Cl溶液和10%Na OH溶液浸泡试验、阴极剥离试验研究了HEH用量、颜料体积浓度(PVC)以及固化剂对涂层防腐性能的影响。采用SEM、EIS和DSC对涂层性能进行了表征。结果表明:HEH与E51按质量比1∶1复配,PVC=0.30且使用脂环胺固化剂时,涂层孔隙率小,致密性好,防腐性能优异。
关键词:
改性环氧树脂,
高固体分涂料,
防腐,
VOC
Abstract: A high solid epoxy coating with VOC of 79. 2 g/L was developed by using self-prepared low viscosity epoxy resin( HEH modified by dimer acid, bisphenol A epoxy resin and low viscosity curing agent. The effects of the amount of self-prepared resin, the PVC of coatings and the curing agents on the corrosion resistance of the coating were studied by salt spray test, 3. 5% Nacl (aq)and 10% NAOH (aq) soaking test and cathodic stripping test.The coatings were also characterized by SEM, EIS and DSC. The results showed that when HEH and E51 were blended at with a mass ratio of 1: 1, PVC=0. 30 and the curing agent was alicyclic amine, the cured coating exhibited small porosity, good density and excellent coro-sion resistance.
Key words:
modified epoxy,
high solid coatings,
anticorrosion,
VOC.
康瑞瑞, 李陈郭, 李至秦, 杨名亮, 苏雅丽, 方大庆. 高固体分环氧涂料的制备与研究[J]. 涂料工业, 2017, 47(12): 36-41.
Kang Ruirui, Li Chenguo, Li Zhiqin, Yang Mingliang, Su Yali, Fang Daqing. Preparation and Properties of High Solid Epoxy Coatings[J]. Paint & Coatings Industry, 2017, 47(12): 36-41.